64279291 has 2 divisors, whose sum is σ = 64279292. Its totient is φ = 64279290.

The previous prime is 64279277. The next prime is 64279307. The reversal of 64279291 is 19297246.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64279291 is a prime.

It is not a weakly prime, because it can be changed into another prime (64279231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32139645 + 32139646.

It is an arithmetic number, because the mean of its divisors is an integer number (32139646).

Almost surely, 2^64279291 is an apocalyptic number.

64279291 is a deficient number, since it is larger than the sum of its proper divisors (1).

64279291 is an equidigital number, since it uses as much as digits as its factorization.

64279291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 64279291 is about 8017.4366851257. The cubic root of 64279291 is about 400.5810119043.

The spelling of 64279291 in words is "sixty-four million, two hundred seventy-nine thousand, two hundred ninety-one".